Python Django测试在响应状态代码404上引发错误

下面是关于django测试的讲座，这是测试之一：

    def test_invalid_flight_page(self):
        max_id = Flight.objects.all().aggregate(Max("id"))["id__max"]

        c = Client()
        response = c.get(f"/flights/{max_id + 1}")
        self.assertEqual(response.status_code, 404)

当我运行manage.py测试时，它会在此测试中抛出一个错误，本质上说没有匹配的航班：

Creating test database for alias 'default'...
System check identified no issues (0 silenced).
.......E..
======================================================================
ERROR: test_invalid_flight_page (flights.tests.FlightTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\sarah\Desktop\airline\flights\tests.py", line 68, in test_invalid_flight_page
    response = c.get(f"/flights/{max_id + 1}")
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 732, in get
    response = super().get(path, data=data, secure=secure, **extra)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 393, in get
    return self.generic('GET', path, secure=secure, **{
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 470, in generic
    return self.request(**r)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 709, in request
    self.check_exception(response)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 571, in check_exception
    raise exc_value
  File "C:\Python\Python385\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Python\Python385\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\sarah\Desktop\airline\flights\views.py", line 21, in flight
    flight = Flight.objects.get(pk=flight_id)
  File "C:\Python\Python385\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Python\Python385\lib\site-packages\django\db\models\query.py", line 429, in get
    raise self.model.DoesNotExist(
flights.models.Flight.DoesNotExist: Flight matching query does not exist.

----------------------------------------------------------------------
Ran 10 tests in 0.120s

FAILED (errors=1)
Destroying test database for alias 'default'...

但这就是问题所在，没有具有该id的航班，因此该请求的响应状态代码应等于404。据我所知，我已经准确地从讲座中复制了代码，但是讲师的测试都运行正常。有人能看到我遗漏了什么吗

当我将预期的response.status\u code更改为200

self.assertEqual（response.status\u code，200）

时，它会给出相同的错误，因此这向我表明主要问题在于响应行？

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当查询解析为空时，您的视图类将无法处理。在

django

中，操作如下：

try:
    result = SomeModel.objects.get(pk=some_id)
except SomeModel.DoesNotExist:
    # Return 404 here